Anxiety or covid symptom

I am 22, i have been diagnosed with MDD (major depressive disorder) n currently on pristiq. Having somewhat short of breathe is quite normal especially during panic attacks, but then since breathing difficulties are also common in covid, when do I need to see a doctor? I do have a bit of dry cough, but that usually occurs when I drink an unsuitable water like osmosis etc; which I did several days ago. I check my temperature everyday and it is always normal. I have also not been outside the country or exposed to anyone with covid (not that I know of; no one has been coughing or sneezing directly to me) I am just worried that it is covid symptoms, but since it overlaps with common things I face, I may accidentaly ignore it. So should I consult a doctor and if yes, when should I do so?